Distributed Amplifiers: Practical Considerations and Experimental Results

The principle of distributed amplification has recently been proposed as a means for obtaining amplification with conventional vacuum tubes over very great bandwidths. Unlike conventional circuits, distributed amplifiers have an attainable gain-bandwidth product which is not limited by shunt capacit...

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Bibliographic Details
Published inProceedings of the IRE Vol. 38; no. 7; pp. 748 - 753
Main Authors Horton, W.H., Jasberg, J.H., Noe, J.D.
Format Journal Article
LanguageEnglish
Published IEEE 01.07.1950
Subjects
Attenuation
Bandwidth
Capacitance
Circuits
Coils
Distributed amplifiers
Electron tubes
Inductance
Propagation losses
Transmission lines
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Summary:The principle of distributed amplification has recently been proposed as a means for obtaining amplification with conventional vacuum tubes over very great bandwidths. Unlike conventional circuits, distributed amplifiers have an attainable gain-bandwidth product which is not limited by shunt capacitance associated with the vacuum tubes and circuit wiring. This paper cites experimental results which essentially corroborate the predictions based on first-order theory. It is pointed out that when extreme bandwidths are sought, these predicted characteristics are modified by several factors which are difficult to control in actual practice. Corrective methods are available, however, which permit a limited control over these modifying effects. These methods are discussed and their applications are illustrated by measurements on actual amplifiers with pass-bands on the order of 200 to 300 Mc.
ISSN:0096-8390
2162-6634
DOI:10.1109/JRPROC.1950.233433